How to solve Memory leaks for following Sqlite code? - iphone

Question

I am getting memory leaks in Instruments in the following Sqlite Code.
NSArray *result = [self executeQuery:sql arguments:argsArray];
It calls following method.
- (NSArray *)executeQuery:(NSString *)sql arguments:(NSArray *)args {
sqlite3_stmt *sqlStmt;
if (![self prepareSql:sql inStatament:(&sqlStmt)])
return nil;
int i = 0;
int queryParamCount = sqlite3_bind_parameter_count(sqlStmt);
while (i++ < queryParamCount)
[self bindObject:[args objectAtIndex:(i - 1)] toColumn:i inStatament:sqlStmt];
NSMutableArray *arrayList = [[NSMutableArray alloc] init];
int columnCount = sqlite3_column_count(sqlStmt);
while ([self hasData:sqlStmt]) {
NSMutableDictionary *dictionary = [[NSMutableDictionary alloc] init];
for (i = 0; i < columnCount; ++i) {
id columnName = [self columnName:sqlStmt columnIndex:i];
id columnData = [self columnData:sqlStmt columnIndex:i];
[dictionary setObject:columnData forKey:columnName];
}
[arrayList addObject:[dictionary autorelease]];
}
sqlite3_finalize(sqlStmt);
return arrayList;
}
How do I solve it ?

Answer 1

We'd need to see the code of your executeQuery method - it should be returning an auto-released result, but perhaps it isn't.
You could try ;
NSArray *result = [[self executeQuery:sql arguments:argsArray] autorelease];
But I'd be wary of just blindly trying that without actually seeing what executeQuery does in detail.
EDIT:
OK, here's your problem;
NSMutableArray *arrayList = [[NSMutableArray alloc] init];
Either create it as an auto-released array, or finish the method with;
return [arrayList autorelease];